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(No Model.)

G. B. SCGTT.

TRANSMITTER FOR PRINTING TELEGRAPHS. No. 304,037. Patented Aug. 26,1884.

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UNITED STATES Parana FFECEG GEORGE B. SCOTT, OE BROOKLYN, NEW YORK.

IPZZGZPICATION forming part of Letters Application filed December 13,1883.

To all; whom, it may concern:

Be it known that I, GEORGE B. Soorr, a citizen of the United States,residing in Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Iniprovements in Printing-Telegraphs, ofwhich the following is a specification.

The obj cct of my invention is to furnish an improved transmitter forprinting-telegraph instruments whose type-wheels are rotated step bystep by short reversals of line-current, and from which impressions aretaken by prolonging a pulsation of either polarity.

My invention consists, first, of means for directing upon the mainlineshort and rapid reversals of electricity to rotate the type-wheel;and, second, means for stopping the typewhecl at any desired characterand means for prolonging an impulse for the taking of an impression fromthe type-whcel. For the purpose of directing short and rapid reversalsupon the line, I provide a circuit-wheel, the periphery of which iscomposed of an equal number of conducting and insulating spaces, thetotal number being equal to the number of characters upon thetype-whccl. This circuitwheel is firmly placed upon a shaft or arbor,and is frictionally gearedto any suitable motor for imparting rotationthereto. The conducting-sections in the periphery of the wheel are inelectrical communication with a hub, upon the periphery of which bears aspring or finger which is in connection with the line wire. Upon theperiphery of the circuit-wheel two spring-fingers are placed. Eachfinger is connected to an independent generator of electricity,respectively of opposite polarity. The

' conducting-spaces upon the periphery of the circuit-wheel are slightlyshorter than the insulating-spaces, and the points of contact of suchfingers upon the periphery of the said wheel are circumferentiallyseparated by a space equal to the length of an insulatingspace. As thecircuit-wheel rotates, a conducting -space passes under the firstfinger, and thereupon a pulsation of one polarity is thrown upon line,and simultaneously with the disconnection of that space from the firstfin- V ger said space passes under the second finger and directs apulsation of opposite polarity upon line, and at the same time aninsulatingspace passes under the first finger. In this Patent No.304,037, dated August 26, 1884.

(N0 model.)

1 way alternately-opposite impulses are directed to line. The means forstopping rotation of the type-wheel and prolonging a pulsation consistsof an arm firmly fixed to the rotating shaft bearing the circuit-wheel;On a fixed support a series of electro-n1agnetsone for each character ofthe type-wheel-are arranged equidistant in the circumference of acircle, or in two concentric series. Each electromagnet is connected bya separate wire with the corresponding circuitclosing key of a keyboard.Each electromagnet has a movable stop controlled by its armature, andnormally resting slightly withdrawn from the plane of rotation of saidarm. When an eleotro-magnet is energized by completion of its circuit atthe normally-open key, such stop is projected into the path of therotating arm, thus stopping rotation of the shaft and circuit-wheel, andthus continuing the pulsation last directed to line. It is to beunderstood that the po-' sition of the electro magnet corresponding toany character of the typewheel and the fixed arm are to hear such arelation to each other that when the fixed arm is arrested by the operation of such electro-Inagnet, as aforesaid, the character of the typewheel corresponding to such electroqnagn'et will be in position to yieldan impression.

Referring to the drawings, Figure 1 is a general view of the transmitterand its connections with the generators. Fig. 2 is a detail sectionalView of one of the elect-ro-niagnets, all of which are alike used forstopping rotation of the shaft, and the circuit-wheel for directingreverse pulsations to line.

8 is a shaft,to which is frictionally geared a motor of any suitableconstruction (not shown) firmly fixed to this shaft is the circuit-wheelO, the periphery of which is divided into conducting and insulatingspaces, the former being slightly shorter than the latter. They shouldbe equal inynumber, equidistant, and together equal in number to thenumber of characters upon the type-wheel. The conducting portion ofwheel G is electrically connected to a hub or roller, h, upon whichbears an arm, H, to which the line-wire is connected. Twospring-fingers, f f, rest upon the periphery of the wheel withsui'ficient force to form a good electrical connection therewith. Thesefingers are circumfercntially distant ICO from each other at contact andupon the pe riphery of wheel 0 a space about equal to the length of oneof the insulatingsections on the periphery of O. Fingerf serves toconnect generator of electricity D of one polarityto line, and fsimilarly serves to connect generator D of opposite polarity to line. Asthe circuit-wheel G revolves in connection with the line-fingers f andf, each alternately rests upon. a conducting-space and aninsulatingspace, and vice versa. Thus a continuous series of reversalsare directed to line.

Firmly fixed to shaft sis an arm, A.

P is a standard or fixture located in a plane parallel to but slightlydistant (say a fraction of an inch) from the plane of rotation of arm A.Aserics of electromagnets, m, are located in this support, and are innumber equal to the number of characters upon the typewheel. They areequidistant, and are placed in the circumference of a circle of whichthe arm A forms the radius. These magnets have a hollow core, 0, throughwhich passes a bar of brass or other non-magnetic material, I),

U Fig.2, to which the armature a is securely fixed. The free end of barI) normally rests but slightly removed from the plane of rotation of armA. lVhen the armature a is attracted, bar Z) is given a longitudinalmovement, carrying it into the path of arm A, by which means arm A,shafts,and wheel 0 are arrested,and a conductingsection of wheel 0 will restunder either f or f, by which means the last reversal directed to lineis continued or prolonged. Each magnet is connected with a circuitcloser or key by an independent wire con- D, main line L, shafts, arm A,and a circular series of stop electroqnagnetsmz, substantially asdescribed.

2. The combination of shaft 3, rotating arm A,support or standard P,acircularseries of stop electro-magnets, m, mounted on said standard orsupport, said electro-magnets on having an axial core of non-magneticmaterial, I), and an armature, a, substantially as described.

3. The combination of the rotating arm A, the circular series of stopelectro-magnets m whose ends are embedded in support P, each of saidelectro-magnets having an axial core of non-magnetic material, b,and anarmature, a, substantially as described.

4. The combination of a stop electromagnet, wt, whose ends are embeddedin the support 1?, adapted to arrest a rotating arm, A, consisting of acoil of wire wound upon a hollow iron core, 0, a movable axial core ofnonmagnetic material, I), adapted to project into the path of A, andarmature a, substantially as described.

GEO. B. SCOTT. lVitnesses:

\V. B. Vansrzn, Wit. ARNoUX.

